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Topic: Anyone have issues jumping PSU after power loss? (Read 782 times)

hero member
Activity: 711
Merit: 500
See my second edit above for an automated reboot suggestion.

ya i guess thats pretty basic electical engineering, but i feel like it would be problematic

i think i am going to get the dual psu adapters and have the host pc boot them all, it'll be nice to have the added ability to reboot the fpga/asics with the computer
sr. member
Activity: 401
Merit: 250
See my second edit above for an automated reboot suggestion.
hero member
Activity: 711
Merit: 500
I have the same PSU. I believe it's a "feature" of the supply. Wink

I have a small jumper wire on my 24-pin ATX connector jumping the green wire to ground. If power goes out/I want to power cycle, I just pull the jumper, wait a second, and reinsert. If you wanted to get fancy, you could use a toggle switch instead.

ya thats what i was saying...i'd like it to boot back even if i'm out of the country for a month....zzz ill suck it up and buy a spliter
hero member
Activity: 711
Merit: 500
lol no offence but you are smoking crack, its a "firmware" issue, its just that the PSU thinks it is short circuited b/c the power-on wire is not toggled, if i undo the and redo the wire it starts back up

just wondering if anyone had anything clever to mitigate this autonomously, i guess i could just get a couple psu splitter type cables and have the pc turn them all on
sr. member
Activity: 401
Merit: 250
I have the same PSU. I believe it's a "feature" of the supply. Wink

I have a small jumper wire on my 24-pin ATX connector jumping the green wire to ground. If power goes out/I want to power cycle, I just pull the jumper, wait a second, and reinsert. If you wanted to get fancy, you could use a toggle switch instead.

In terms of making a "hands-off" method of getting it to come back after a power loss... I don't have any great suggestions, but since delaying the application of ground to the green wire seems to work, maybe you could use a simple R-C (resistor-capacitor) circuit to slow down the voltage ramp rate. If not... I suppose you could always use a separately powered 555 timer or microcontroller to act as a power sequencer. Give it control of a switch and have it tie green to ground after a second or two.
newbie
Activity: 56
Merit: 0
It might be the circuit protection kicking in - I have exactly the same issue.

To reset the "breaker" you have to kill power to the PSU then it will start up again.

Do you know what caused the power loss? Or are they just cutting out?

If they are just cutting out then it is overload.

oh no it was me switching configurations around, it may not be an issue with an actual power loss due to longer length

jw if anyone had a cleaver way of fixing this cheap

If you are having trouble restarting your PS after a shut down; the only likely issue that I can point to is your 5V reserve rail.
This rail is responsible for the power standby necessary to start the PC.
It is also the first rail to take damage when you overtax your system: usually, through a ground imbalance.
This means that you are overdoing it. If you have an 850W PS, you only want to use 680ish or less for video cards.

It is likely fixable, but way beyond your capabilities (no offence). May be worth it if you could fix it, but not worth it to pay.

Unfortunately, like a $2 whore when your're done, You're Done!

Are they under warranty?
hero member
Activity: 711
Merit: 500
It might be the circuit protection kicking in - I have exactly the same issue.

To reset the "breaker" you have to kill power to the PSU then it will start up again.

Do you know what caused the power loss? Or are they just cutting out?

If they are just cutting out then it is overload.

oh no it was me switching configurations around, it may not be an issue with an actual power loss due to longer length

jw if anyone had a cleaver way of fixing this cheap
full member
Activity: 238
Merit: 100
It might be the circuit protection kicking in - I have exactly the same issue.

To reset the "breaker" you have to kill power to the PSU then it will start up again.

Do you know what caused the power loss? Or are they just cutting out?

If they are just cutting out then it is overload.
hero member
Activity: 711
Merit: 500
I have two Rosewell  Fortress PSUs which refuse to power on after power loss. I simply have the power on wired with teh ground. I think it is something to do with short circuit protection?

If i leave it plugged in but "off" for awhile it will turn back on...has anyone come up with a good way to get these to turn back on with no intervention?
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